Dust cap for tire valves and the like



April 29, 1924. 1,492,077

H. P. KRAFT DUST CAP FOR TIRE VALVES AND THE LIKE Original Filed Jan. 11 1921 INVENTOR Patented Apr. 29, 1924.

Q .nnmtrr. KRAF or nrn enwoon, :NEW Jansen.

D U ST CAPIOR TIRE VALVES AND THE LIKE.

Application filed January 11, 1921,"Seria1 N0. 436,42. Renewed August 10, 1923.

residing in Ridgewood, in the county of Bergen and State of New Jersey, have invented certain new and useful Improvements in Dust Caps for Tire-Valves and the like,

of which the following is a specification.

, This invention relates to dust caps for C s vulcanized to the interior of the sleeve tire valves and the like, and aims toprovide certain improvements therein.

The invention is directed to a dust cap of the friction type which is designed to slide over the casing of a tire valve, in either direction, holding its adjusted position by a frictional grip upon the casing.

According to the present invention, 1 provide a cap of this type in which the frictional member is metallic or formed of other material of a non-resilient character, being preferably in the form of a split metal band.

It is mounted in the dust cap with a backing of resilient material, such as rubber.

resilient backing may be applied to any suitable form of cap and may be of different material, or the cap itself may be made of rubber or rubber composition, either elastic or otherwise, in which case the backing may be integral with the cap. Other features of this invention will be hereinafter more fully pointed out.

Referring to the drawings which illustrate several forms of the invention,-

Figure 1 is a diametrical section of one form of the improved cap, shown as applied to the tire valve.

Fig. 2 is a plan of the friction member with its resilient backing.

Fig. 3 is a diametrical section of Fig. 2.

Fig. 4 is a similar section of a slightly modified form.

Fig. 5 is an elevation, partly in diametri cal section, showing the invention as applied to a rubber cap.

Referring first to Figures 1 to 3, let A represent the dust cap as a whole which comrises a cap portion B, a friction member g and a backing D.

In Fig. 1, the cap portion B is shown as formed of drawn sheet metal having an enlarged foot E, which provides an annular recess on the interior of the cap. The friction member C is preferably made of metal, or, it may be constructed of other non-re= The silient. material. .It is shown as a'band but may be constructed of a plurality of bands ofrings. As shown, it is preferably split,"

so as to be capableof yielding to pass over the threads of a tire valve F.

Between the band C and the wall ofthe cap is, the resilient backing D, which is shown as formed as a rubber ring or sleeve.

As, best constructed, the friction member D, or they are provided with other interengaging means, so that the band holds its position in the sleeve D.

As illustrated in Fig. l, the recess at. the

foot of the cap is best so proportioned so.

it'does not completely receive the sleeve D. By this means the band C is capable of considerable expansion before it becomes flush. With the interior wall of the cap pori tion.

Whenconstructed, as thus described the ca has a firm frictional grip upon-the tire va ve casing, while at the sime time it is very. easily and smoothly passed along the threads of the valve. It is not necessary to provide any special means of connection between the backing and the cap, the backing holding its position within the recess of the cap, without special means of attach ment. In. constructing the cap, its sleeve D and band C may be introduced, and a flange G of the cap portion turned over the sleeve, or the cap portion may be manufactured complete and the sleeve 1) com throughout, elastic rubber being preferred.

The bottom of the. cap is thickened to form a backing D within which is located the friction membersuch as C or C. In this .case the friction member is preferably vulcanized in the cap during the process of manufacture of the latter.

While I have shown and described several forms of the invention, it will understood that I do not wish to be limited thereto,

since various changes may be made therein -Wlth0l1l3 departing from the spirit of the ber; and a resilient 'bzickingfor the frictional member.- up. 2. A dust cap for tire valves and the like,

comprising a capportion, acfriction'a-l-imein ber formed of non-res lient material andr arresilient backing for the frictional 'inember; A :3Q Adnst'capforLt-ire vilves andtthe -like,

' comprising; a cap-portion, frictional member comprising a 'spliitjband, and asilient backing for.such frictionzil memben;

I 4. Avdnst capfor'tirevelve's and the like, "comprising a cap portion; a resilient- Tsl'eeve insrsa-id cep portion, and'a frictional meniber of i non-resilient materiel 'vv-Itl'nn said sleeve.

5. Adust cap for tire valves and thelike;

comprisin'g a cap portion, a'recess in the bottomof said. cap portion, a rubber sleeve in said recess, end 21' metallic friction member Within said rubber sleeve. 7

e 6. Afdust capfortire valves and the like, comprising "a cap portion, and a frictional member, comprising a split band having a corrugated interior face, the corrugations being disposedaat an angle to the longitudinal axis of the cap, said frictional member being connected vitlr said? cap portion;

'7; A dust cep for tirejve-l-vesand the like,

comprisin a cap p o'rtion; n'frictionalniem- "ber comprising n split bend -havmg e' corrugated lI1t( I1 OI" fE1 Ce, sardfrictional ni'embe being; connected with said cap; portion,

member.

Aizgrsilierit be cking for' said frictional In Witness whereof; I have hereunto signed my=narnee 5 

